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Journal articles on the topic 'Soil nailing'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 September 2023

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1

Jin, Qing Ping, Zu Jia Zheng, Zhi Chen, and Xue Wen Lei. "Simulation and Optimization on GFRP Soil Nailing Support." Applied Mechanics and Materials 477-478 (December 2013): 543–46. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.543.

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Glass Fiber Reinforced Polymer (GFRP) soil nailing is great different from steel bar soil nailing in mechanical parameters and the properties. According to a excavation engineering supported by soil nailing, the support structure of soil nailing was simulated by finite element method. By analyzing the displacement, the force, the plastic area and other aspects in sensitive position, the results show that two types of soil nailing can ensure the stability of the slope under the same arrangement. The maximum displacement of GFRP soil nailing on control points of the slope is more 7% to 10% than steel bar soil nailings. Plastic zone of GFRP soil nailing support structures are more obvious in the range and the extent. The arrangement of GFRP soil nailing had been optimized by finite element software, the distance 1.6~1.8m between soil nailings is more appropriate for support structure.
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2

Syuhada, Syahidus, Zakaria Zakaria, Rahmat Kurniawan, and Erdina Tyagita Utami. "ANALISIS MODEL ELEMEN HINGGA PERKUATAN LERENG MENGGUNAKAN SOIL NAILING (STUDI KASUS : LERENG DAERAH LAHAT, SUMATERA SELATAN)." FROPIL (Forum Profesional Teknik Sipil) 8, no. 1 (June 29, 2020): 36–45. http://dx.doi.org/10.33019/fropil.v8i1.1721.

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ntuk menghadapi masalah kelongsoran lereng, banyak metoda yang digunakan, misalnya mengubah geometri dari lereng, membuat perkuatan dinding penahan tanah, vegetasi, dan masih banyak lainnya. Salah satu ,metoda yang banyak digunakan adalah soil nailing. Perkuatan lereng dengan menggunakan soil nailing yaitu dengan memanfaatkan tiang beton bertulang yang dimasukkan ke tanah. Tanah dan beton bertulang diharapkan membentuk suatu struktur yang kuat di depan lereng, seperti prinsip perkuatan dengan timbunan dengan geosintetik. Seiring dengan berkembangnya metoda komputasi, dapat digunakan program komputer dengan basis perhitungan metoda elemen hingga. Untuk memodelkan perkuatan soil nailng tidak tersedia di dalam program elemen hingga, sehingga digunakan pendekatan material untuk memodelkan hasil perkuatan yang mendekati perilaku dari soil naling. Telah banyak dimodelkan struktur perkuatan lereng soil nailing dengan model plate dan geogrid. Untuk perilaku dari soil nailing cenderung menyerupai elemen node to node pada program FEM tersebut, sehingga patut untuk diketahui perilaku soil nailing ketika dimodelkan dengan node to node. Analisis model dilakukan dengan variasi panjang penanaman soil nailing dan kemiringan soil nailing. Dari hasil permodelan dapat dilihat perilaku material node to node mendekati hasil SF dengan material set geogrid. Semakin besar sudut pemasangan, hasil SF relatif sama. Perbedaan antara hasil SF dari material set geogrid / node to node dengan plate adalah sebesar 0.02 % - 5.12%.
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3

Jin, Qing Ping, Zu Jia Zheng, Bin Qiang Dou, and Xue Wen Lei. "FBG Sensor Application for GFRP Soil Nailing Pull-Out Test." Applied Mechanics and Materials 477-478 (December 2013): 539–42. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.539.

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The mechanical performance of GFRP soil nailing in the supporting structure is an important and difficult problem. By implanting the fiber bragg grating sensor (FBG) into GFRP soil nailing, pull-out tests were done on filed,and stress rules of soil nailing bar were determined.The more reasonable and effective force data of soil nailings were also gathered through FBG senor.Test results show that the tension of soil nailing gradually adds with external pulling force, the variation of tension is divided into two stages, the total pulling force is within 50kN, growing linearly with about 2.5% rate ,after that, its growth rate is approximately 50% to 60%. After the force exceed a certain value, the load is transmitted backward.FBG sensing technology overcomes the failure problem of traditional strain sensor,is a precise measurement method.
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4

Zhao, Yan Lin, Hao Bin Zhang, Qing Pan Zhu, and Dong Chen. "Simulation Analysis on Tension and Deformation of Composite Soil Nailing." Applied Mechanics and Materials 405-408 (September 2013): 182–86. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.182.

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For studying the mechanism of the composite soil nailing, this paper applies FLAC-3D to simulate pure soil nailing, soil nailing-soil anchor, soil nailing-micro pile-soil anchor. The analytical results as follows: (1)Because of the anchoring of the anchor, the axial tension of soil nailing in each row is much smaller than the one in the pure soil nailing supporting, and the tension of soil nailing which are closed to soil anchor decreases obviously. (2)The extrusion action of prestressed anchor makes the potential slip surface backward shifts and the sliding radius increases, which is better for the stability of foundation pit side (3)Micro-pile increases the strength of the soil in a certain range and improves the initial stress field before the excavation. (4)The inner force of the whole soil nailing and the prestress anchor declines but the drop is not large after the establishment of the micro-pile support in advance. (5)Prestressed anchor and micropile play a very important role in controlling the deformation of foundation pit.
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5

Rosita Anggraini, Fenny. "Analisa Perbandingan Perkuatan Tanah Soil Nailing dan Shotcrete pada Proyek Gelanggang Inovasi dan Kreativitas Universitas Gadjah Mada." Jurnal Sosial Teknologi 3, no. 5 (May 15, 2023): 369–75. http://dx.doi.org/10.59188/jurnalsostech.v3i5.713.

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Proyek pembangunan Gedung Gelanggang Inovasi dan Kreativitas Universitas Gadjah Mada (GIK-UGM) berada di kota Yogyakarta. Banyaknya bangunan di sekitar ini, jadi perlu adanya perkuatan ketika akan membangun sebuah gedung. Penggunaan metode soil nailing dan shotcrete pada basement sebagai upaya agar tidak terjadi pergeseran tanah pada bangunan. Di sisi lain penggunaan metode soil naling dan shotcrete metodenya mudah dilaksanakan dan tidak menimbulkan suara dan getaran yang besar. Karena berbatasan dengan bangunan eksisting sehingga tidak dapat dilakukan metode galian open cut. Oleh karena itu perkuatan lereng diperkuat dengan pekerjaan soil nailing dan shotcrete. Soil nailing merupakan salah satu metode perbaikan tanah yang mengombinasikan perkuatan pasif dari batangan baja dan adukan beton (shotcrete). Campuran berbahan dasar semen yang disebut shotcrete dilemparkan ke permukaan penerima dengan kecepatan tinggi. Tujuan dari penelitian ini adalah mengetahui perbandingan biaya dalam pekerjaan soil nailing dan shotcrete serta mengetahui metode pelaksanaan soil nailing dan shotcrete. Berdasarkan perbandingan harga satuan pekerjaan didapatkan harga untuk pekerjaan soil nailing yaitu Rp345.000,00 sedangkan pekerjaan shotcrete Rp460.000,00. Pekerjaan soil nailing lebih menghemat biaya daripada pekerjaan shotcrete. Metode pekerjaan soil nailing dan shotcrete sudah sesuai urutan dan teknik pengerjaan yang mudah.
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6

Ding, Jun Xia, Guang Qing Yang, Bao Lin Xiong, and Qiao Yong Zhou. "Behavior of Soil Nailing Protection with High and Steep Bedding Stone Cutting." Advanced Materials Research 243-249 (May 2011): 2716–19. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2716.

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This study is expected to research the performance, behaviors and strength of soil nailing by field test, based on the engineering of soil nailing wall protection with the high and steep bedding stone cutting in Chong Qing - Huai Hua Railway in China. We test the nail force of different station on different row soil nailing with vibrating reinforcing meter. Some conclusion elicited such as the rule of nail force with nail length and time, the potential sliding surface and the rule of soil nailing wall earth pressure with the height of wall. The test results can be used as reference for the design and construction of soil nailing wall.
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7

Zhao, Jie, and Ling Li Wang. "Finite Element Simulation and Stability Analysis of Composite Soil Nailing." Applied Mechanics and Materials 580-583 (July 2014): 83–88. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.83.

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Under the condition of plane strain, a 2D elastoplastic FEM is used to analyze the behavior of composite soil nailing bracing of deep excavation, then finite element method of stability analysis is applied to evaluate the stability of the soil-nail wall. The authors analyzed the difference between composite soil nailing and normal soil nailing. Through analyzing the effect of bracing parameters on the deformation behavior and stability of the excavation, some useful conclusions are obtained to provide certain references for the design and construction of composite soil nailing.
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8

Mohamed, Mahmoud H., Mohd Ahmed, Javed Mallick, and Saeed AlQadhi. "Finite Element Modeling of the Soil-Nailing Process in Nailed-Soil Slopes." Applied Sciences 13, no. 4 (February 7, 2023): 2139. http://dx.doi.org/10.3390/app13042139.

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The finite element technique has been accepted as a tool for modeling geotechnical complex processes. In this study, finite element (FE) modeling of various stages of the soil-nailing process, i.e., construction stages and overburden pressure stages, is carried out considering different soil parameters, simulating with in-house developed laboratory models. The soil-nailing process built in laboratory models is idealized as a plain strain problem and modeled in PLAXIS software. The laboratory models of the soil-nailing process consist of a Perspex sheet box containing a sandy soil slope, a Perspex sheet facing, steel bars as reinforcement and a steel plate as foundation. The stress–strain relationship of the sand is represented by a Hardening-Soil model. The interface at the soil and nail is described by the Coulomb friction model. The behavior of the soil-nailing process, during the construction stage and under varying overburden pressure and varying soil density, are investigated in terms of displacements of slope and stress conditions in slope soil mass. The slope displacements and stress conditions in slope soil mass are all well presented by the FE modeling and compared with laboratory model test data. The sensitivity analysis of the laboratory models’ dimensions is carried out by three-dimensional modeling of the nailed-soil slope. It can be concluded that the developed finite element model has the potential to simulate the performance of a field nailed-soil slope during construction and working stages and could provide guidance for the construction/maintenance of soil-nailed cut slopes in granular soils/weathered rocks.
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9

Zhang, Shu Long, and Fen Ting Lu. "Numerical Analysis of Composite Soil Nailing Wall." Advanced Materials Research 1065-1069 (December 2014): 48–52. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.48.

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Abstract. The horizontal displacement of soil in slope and the change law of ground surface settlement are dynamically analyzed by building three dimensional-model of foundation pit with the finite element software, ABAQUS, to simulate the construction process of excavation and support, to figure out the influence of micro pile and waterproof curtain on composite soil nailing wall. The study indicates that mechanical model of soil nailing, waterproof curtain, micro pile, pre-stressed anchor interacting with soil can better simulate the construction process of composite soil nailing wall support and have higher calculation accuracy. The calculation can provide a reference for the design and construction of composite soil nailing wall.
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10

Guo, Bing. "Simulation and Analysis on Supporting System of Composite Soil Nailing Technology in the Process of Digging." Advanced Materials Research 568 (September 2012): 66–70. http://dx.doi.org/10.4028/www.scientific.net/amr.568.66.

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According to the typical engineering example and the structural features of the supporting system of composite soil nailing technology, the computing mode of deformation of composite soil nailing technology under force is established. Numerical analysis and supervision in the process of construction on composite soil nailing technology are made with the collocation of typical project example. The data of monitoring on the spot and numerical simulation show that the supporting system of composite soil nailing technology meets the requirement of real deformation under force and can simulate the real features of the stress field and displacement field in the process of construction. The design methods meet the requirement of accuracy, and the result presents important technical reference for design and construction of the supporting system of composite soil nailing technology.
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11

Wen, Li Ping, Su Li Wang, and Xu Ping Zhu. "Design and Application of Special Slop Retaining." Advanced Materials Research 168-170 (December 2010): 652–57. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.652.

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Taking the design of composite soil-nailing in deep foundation pit in complex surroundings for example, the paper discusses numerical analysis of soil-nailing using FLAC, a general analysis program of geotechnical engineering, used to predict the displacement and interior force in soil-nailing. Furthermore, a comparison about the interior force in soil nails between the numerical analysis and the traditional methods is made. The measurements show that the numerical analysis is more accurate than traditional methods. The conclusion is drawn that by contrast with the deficiency of traditional methods, more satisfactory results can be got from numerical analysis on composite soil-nailing using the program of FLAC.
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12

Wang, Kui Yang, and Hong Guang Ji. "Experimental Study on Timeliness of Pullout Force of Grouting Soil Nailing." Advanced Materials Research 261-263 (May 2011): 1480–83. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1480.

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Pullout force of grouting soil nailing is a key to support. This test revealed that limit pullout force of soil nailing increased with the time. The timeliness function was asked for by Origin software. It's the cause for many failure accidents in soil nailing support engineering. But it was often neglected in engineering design and construction.
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13

Mohammad Zaki, Mohd Faiz, Wan Amiza Amneera Wan Ahmad, Afizah Ayob, and Teoh Khai Ying. "Analysis of Soil Nailing under Earthquake Loading in Malaysia Using Finite Element Method." Applied Mechanics and Materials 695 (November 2014): 526–29. http://dx.doi.org/10.4028/www.scientific.net/amm.695.526.

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Soil nailing has become a widely accepted method and offers a practical solution towards construction of permanent retaining wall, slope stabilization and protection of existing cuts from failure. In Malaysia, soil nailing is typically performed on cut slope and installed with grouting as preventatives method due to erosion problem. However, although the effectiveness of soil nailing system may be well understood by practitioners, the slope failure and collapses of deep excavation are continuously occurs, especially for the construction in the earthquake zone. Malaysia has numerous experiences of earthquake even this country has been categorized as low seismicity group. Hence, it is become important in the scope of geotechnical engineering to analyze and study the effect of earthquake to soil nailing systems in Malaysia. Aims of this paper are to focus and study this technical issue using the application of finite element program. This research study selects PGA of 0.08g based on the location of major population in Malaysia. Safety factor was calculated in this finite element program using phi-c reduction. Soil nailing relatively give satisfactory response under seismic, so pseudo-static method is applied for seismic loading study. Based on the static analysis results, the FOS for the deep excavation stabilized with soil nailing is 1.54. However, by considering the earthquake or seismic loading, the FOS reduces to 1.16 and the percentage of reduction is about 25%. Total displacement was observed slightly difference in soil nailing analysis during an earthquake and static analysis
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14

Yang, Meng, and Xiao Min Liu. "Study on the Calculation Method of Soil-Nailing for High Soil Slope Based on the Logarithmic Spiral Slippery Fracture." Advanced Materials Research 261-263 (May 2011): 1709–13. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1709.

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This paper introduces a new failure mode pattern of soil slope – the logarithmic spiral slippery fracture. A mathematical model for the logarithmic spiral slippery fracture is established, taking the anti-shear function of the soil-nailing into consideration. The shear of soil-nailing, axial force, and the safety coefficients based on the limiting equilibrium method are derived, leading to an accurate stability analysis of the strengthening of soil slope. A case study shows that the anti-shear function of the soil-nailing can be significant and should not be ignored in engineering design.
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15

Pham, Nhan Thi, Pan Bing, and Nghia Viet Nguyen. "Study on the effect of some parameters of soil nails on the stability of vertical slopes." Journal of Mining and Earth Sciences 61, no. 6 (December 31, 2020): 30–37. http://dx.doi.org/10.46326/jmes.2020.61(6).04.

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Soil nailing is one of the soil reinforcement techniques that has been used worldwide in geotechnical engineering. In Viet Nam, soil nailing technology applied in a number of transportation investments such as Ha Long - Van Don, Bac Giang - Lang Son highways, and some of the hydropower plants in the central provinces of Viet Nam. Soil nailing is a system consisting of reinforced concrete piles and rebars or composite rods installed in an inclined direction into the slope. The research and applications of soil nailing technology to reinforceslopes in Viet Nam have not been widespread. The authors only considered construction technologies, processes, requirements for the materials, equipment, quality - check of soil nails, etc. The optimal geometries of soil nails for the stability of slope are inadequate and analyzed thoroughly. These lead to inaccurate prediction of the construction stabilization effect and the safety of designed structures. In the present study, numerical simulations were conducted to investigate the effects of the inclined angle and the length of soil nail Patterns and subjected to surcharge loads on stability improvement of soil - nailed slopes and facing deformation in a staged - excavation. The research results show that the soil nail reinforcement efficiency could be affected by inclinations and length Pattern s of soil nails. The general conclusion is that the more soil is nailing inclinations, the more the reinforcing forces in the soil nails. The soil nail length Patterns have also influenced displacement characteristics of slopes.
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16

Bathini, Divya Jyothi, and V. Ramya Krishna. "Performance of Soil Nailing for Slope Stabilization-A Review." IOP Conference Series: Earth and Environmental Science 982, no. 1 (March 1, 2022): 012047. http://dx.doi.org/10.1088/1755-1315/982/1/012047.

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Abstract A landslide is a geological event involving a wide range of ground motions that leads to the collapse of soil slope. The stabilization of these soil slopes is done by constructing retaining walls to withstand lateral soil pressure. These retaining walls are costly as well as it is difficult to construct as they require wide excavation for the base or bottom slab. One of the many new solutions to slope stabilization is the soil nailing built by strengthening the steep slope by driving reinforcement into the soil. In this study, a review of the origin and mechanism of soil nailing, the construction process of soil nailed retaining walls were discussed. The failure pattern of soil nails is an important factor to be noticed which influence the stability of soil slope was discussed. Numerical studies were given, which are used to determine the adverse effect of orientation and inclination of nails on the stability of soil nailed walls. A couple of case studies were discussed to evaluate the significance of soil nailing on the stability of the slope and to retain the vertical cut. A Laboratory study was considered to estimate the effect of nail inclination and different nail arrangements on settlement of soil slope. A sequential literature review investigates the application, advantages and disadvantages of soil nailing. This study shall help in understanding the various applications of soil nailing in the civil engineering sector.
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17

Fu, Yu Yong, and Shu Wang Yan. "The Finite Element Analysis on Foundation Supported with Composite Soil Nailing." Advanced Materials Research 261-263 (May 2011): 1608–13. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1608.

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This article adopts the general finite element analysis software——ANSYS to do the numerical analysis and research on some Composite Soil Nailing. The Drucker-Prager model modified with depth was adopted as the constitutive model. The article presents a lot of numerical calculations and analysis, researching the effects of excavation order, nailing length and nailing obliquity to the horizontal displacement of foundation wall, surface sedimentation and rise of the foundation bottom, giving some useful conclusion which can be used as the references to the design and construction of foundation supported with Composite Soil Nailing.
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18

Gao, Lang, Zhao Wen Tang, and Quan Zhong Liu. "Displacement Prediction for Soil Nailing Based on ANN." Applied Mechanics and Materials 353-356 (August 2013): 614–18. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.614.

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Soil nailing has become an important excavation support system for its good performance and cost-effectiveness. It is complicated to predict deformation of soil nailing during excavating. The Artificial Neural Network (ANN) is developed very quickly these years, which can be applied in diverse applications such as complex non-linear function mapping, pattern recognition, image processing and so on, and has been widely used in many fields, including geotechnical engineering. In this paper, the artificial neural network is applied for deformation prediction for soil nailing in deep excavation. The time series neural networks-based model for predicting deformation is presented and used in an engineering project. The results predicted by the model and those observed in the field are compared. It is shown that the artificial neural network-based method is effective in predicting the displacement of soil nailing during excavation.
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19

Qiao, Lan, Li Kai Liu, Hai Tao Wei, Yuan Li, and Xi Wen Li. "Study on Mechanical Property and Displacement of Latticed Soil Nailing Support." Applied Mechanics and Materials 182-183 (June 2012): 1662–67. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.1662.

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Latticed soil nailing support is a new type of revetment structure, which combined lattice support and soil nailing. It effectively improves the global stability of the foundation pit. Currently, the theoretical research about this supporting method is still not consummate. In this paper, on the basis of soil mechanics and code, the stability of latticed soil nailing support are analyzed by the theory of the retaining wall, soil nail and the model of supporting piles. Then calculate the displacement in the limit state by elastic fulcrum method and the instantaneous displacement by layer-wise summation method. The total displacement can be calculated by the combination of the two displacements above, which is between 3.38mm and 15.43mm and close to the measured data. Simulate excavation and supporting process of the pit by finite difference method, analyze the mechanical property and displacement of latticed soil nailing support. Thus the theory of the calculation method to this supporting model is obtained, offering a reference for the similar projects.
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20

Taib, S. N. L. "A Review of Soil Nailing Design Approaches." Journal of Civil Engineering, Science and Technology 1, no. 2 (April 1, 2010): 1–6. http://dx.doi.org/10.33736/jcest.70.2010.

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A number of design manuals and recommendations; namely by the HA 68 [4] (U.K.), BS8006 [1] (U.K.), RDGC [7] (France) and FHWA [5] (USA) are available for soil nailing. This paper will focus on the different approaches, specifically on the assumptions made for the design of soil nailing structures.
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21

Bridle, R. J. "Soil nailing - analysis and design." International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 27, no. 2 (April 1990): A103. http://dx.doi.org/10.1016/0148-9062(90)95173-x.

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22

Yan, Zhi Gang. "FEM Analysis of Composite Soil-Nailing Considering Tensile Failure." Applied Mechanics and Materials 105-107 (September 2011): 1488–91. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.1488.

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Composite soil-nailing is a new technology developed from abroad in recent years, to be used in excavation of soil, slope stability. This paper studied the stress and deformation of composite soil nailing wall by nonlinear FEM. According to the structure characteristic, the finite element analysis for composite soil nailing construction process is carried out. Based on geotechnical elastic-plastic constitutive model, the adopted failure criterion was a composite Drucker-Prager criterion with tension cut-off. A kind of rotational Goodman interface element is employed to simulate the behavior of interface between the soil-mixed cement which forms the barrier of seepage flow along the boundary of foundation pit, and soil ground. Through the comparative analysis with on-site monitoring data, the finite element calculation results have good precision.
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23

Wang, Yong Sheng, and Li Hua Wu. "The Engineering Application of New Method for Calculating Seismic Active Earth Pressure of Soil-Nailing Retaining Structures." Advanced Materials Research 915-916 (April 2014): 86–89. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.86.

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Based on the method for calculating seismic active earth pressure of soil-nailing retaining structures literature [ , the effect of horizontal seismic coefficient on seismic active earth pressure and the most dangerous sliding are analyzed in connection with practical engineering projects, and compared with the result which is not considered the seismic action. Results show that The existence of soil nails can effectively reduce the lateral pressure of supporting structures under earthquake ground motions and make the sliding surface slowly move to the wall back; Increased along with the height of soil nailing wall;With the increase of the height of soil nailing wall ,facing wall the sliding movement amplitude increase under the action of earthquake, and the soil nail length is growing.
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24

Ma, Tian Zhong, Yan Peng Zhu, Chun Jing Lai, and De Ju Meng. "Study of Seismic Design Method for Slope Supporting Structure of Soil Nailing." Applied Mechanics and Materials 353-356 (August 2013): 2073–78. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.2073.

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Slope anchorage structure of soil nail is a kind of economic and effective flexible slope supporting structure. This structure at present is widely used in China. The supporting structure belong to permanent slope anchorage structure, so the design must consider earthquake action. Its methods of dynamical analysis and seismic design can not be found for the time being. The seismic design theory and method of traditional rigidity retaining wall have not competent for this new type of flexible supporting structure analysis and design. Because the acceleration along the slope height has amplification effect under horizontal earthquake action, errors should be induced in calculating earthquake earth pressure using the constant acceleration along the slope height. Considering the linear change of the acceleration along the slope height and unstable soil with the fortification intensity the influence of the peak acceleration, the earthquake earth pressure calculation formula is deduced. The soil nailing slope anchorage structure seismic dynamic calculation model is established and the analytical solutions are obtained. The seismic design and calculation method are given. Finally this method is applied to a case record for illustration of its capability. The results show that soil nailing slope anchorage structure has good aseismic performance, the calculation method of soil nailing slope anchorage structure seismic design is simple, practical, effective. The calculation model provides theory basis for the soil nailing slope anchorage structure of seismic design. Key words: soil nailing; slope; earthquake action; seismic design;
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25

Md. Noor, M. J., and M. F. Jamain. "Pull Out and Creep Behaviour of Soil Nailing – A Case Study." Journal of Mechanical Engineering 16, no. 1 (April 1, 2019): 189–211. http://dx.doi.org/10.24191/jmeche.v16i1.6072.

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The use of soil nails for slope strengthening is one of the popular methods since 1980s due to the attractive benefits of simple and fast installation method to reinforce cut slope. Proper assessment of the soil nail behavior between the nails and the surrounding soil will contribute to the safe and economical design of the reinforced soil structure. At present, the safety factor is adapted to soil nailing design and analysis, however, some soil nailed slope, which are designed, in compliance to the slope guidelines end up with failure. For the current knowledge, there is limited information on the loss of the shaft friction in soil nailing due to creep and the research on the behavior of the soil nail is also limited. Hence, in order to provide additional information on the behavior of the conventional soil nailing system, the bore holes and pull out test data were collected from the various projects: 1) Cheras, Kuala Lumpur, 2) Penang Hill, Penang, and 3) Kajang, Selangor. This study is focused on the behavior of the soil nail under pull out test at various types of soils and different soil nails characteristics. The parameters measured are soil nail pull out resistance and displacement of soil nails under different loading. In addition, the creep behavior of the soil nail was a study based on the displacement under maintain period at maximum test load during the pullout test. The creep behavior of soil nail is causing the loss of tension in the soil nail and that affecting the performance of the engineered slope. For the study and result presented, it is clear that soil nail under certain types of soil, especially dry, poorly graded cohesionless soils or soil with high water table is creep susceptible and had a lower pull out resistance. Pull out test on soil nail installed in medium stiff clayey Silt and sandy Silt and socketed in rock is performing up to design expectation.
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26

Cao, Jing, Tian Liu, and Hai Ming Liu. "Soil Nailing Reliability Optimization Design of Foundation Pit Based on Response Surface Method." Applied Mechanics and Materials 556-562 (May 2014): 4655–59. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.4655.

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Aiming at the randomness and variability of geotechnical parameters, the uniform test and nonparametric regression technique of alternating conditional expectation (ACE) is used to establish the efficiency response surface. On the basis of response surface, the Monte Carlo method was used to research the reliability optimal design and analysis method of soil nailing structure. Considering various failure modes of soil nailing structure, and setting the system failure probability as constraint, and per linear meter length of soil nail as the objective function, than to establish the reliability optimal model of soil nailing structure of foundation pit with the indexes of soil shear strength c, φ and ground overload as random variables. Through an engineering case analysis, the feasibility and effectiveness of this method are verified. Finally, the superiority of the proposed method is proved compared with the deterministic method.
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27

Zeng, Yong. "The Analys of Stability of Composite Soil Nail." Applied Mechanics and Materials 580-583 (July 2014): 503–8. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.503.

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Composite soil nailing technology is a new technology which developed on the basis of the soil nailing supporting technology. This new technology has a very important practical significance to the construction, for which the scale is larger and larger, the condition is more and more complex and the excavation of foundation is more and more deep. Composite soil nailing technique is mainly introduced in this paper by its main form of structure and the main principle, which draw a conclusion that different forms of the combination of support types have different effects on the stability of structure, by analyzing the support stability. This thesis shows that we should adjust measures to local conditions, choose the right organic combination. At the same time it also provides the basis for the practical application of engineering support.
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28

Chen, Chang Wen. "Numerical Simulation Analysis of Soil Nailing Wall Based on FLAC during the Excavation of the Foundation Pit." Advanced Materials Research 594-597 (November 2012): 2906–14. http://dx.doi.org/10.4028/www.scientific.net/amr.594-597.2906.

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On the basis of a typical engineering, a foundation of soil nailing walls supporting simulation model of soil nailing on the structure of the excavation is established with FLAC, the construction process of the supporting structure is analyzed in the dynamic simulation. The deformation characteristics of the supporting structure are analyzed during the construction process, the law of the supporting body deformation with the difference of excavation steps is summarized. The situ test data of the deep foundation horizontal displacement and vertical displacement are obtained by testing in situ. Some useful conclusions are summarized by comparative analyzing the numerical simulation value and situ test data, providing guidance for the design and construction of the pit soil nailing wall.
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29

Kim, Ji-Seong, and Mi-Ok Ku. "Slope Stability Charts of Soil Nailing Method for Slope Diaster Prevention." Journal of the Korea Contents Association 16, no. 7 (July 28, 2016): 457–64. http://dx.doi.org/10.5392/jkca.2016.16.07.457.

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30

Lu, Rui Li, and Qing Hui Jiang. "Reinforcement Scheme and Numerical Simulation for Sequential Excavation of the Deep Foundation Pit." Applied Mechanics and Materials 204-208 (October 2012): 359–65. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.359.

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The deep foundation pit engineering of Wanda Plaza in Yinchuan city is taken as a case study and the corresponding numerical model has been built. The deformation and stability of the foundation pit during sequential excavation has been analyzed by using of the FLAC3D software. The weak positions which may lose the stability are predicted by the results from the numerical simulation. A soil-nailing reinforcing scheme has been proposed to maintain the stability of the foundation pit. To analyze the support effects of the soil-nailing, the Cable structure elements have been adopted to simulate the interaction between soil and soil-nailing. The calculation results show that the maximum horizontal displacement occurs in the middle part of the pit wall and the minimum occurs in corner part of the pit wall. The soil nailing support significantly decreases the deformation of foundation pit by dispersing internal stress of soil. The reliability of the simulation results has been verified by the comparative analysis between the numerical simulation results and the deformation monitoring data of foundation pit. The proposed reinforcement scheme is not only helpful to ensure the safety of Wanda Plaza foundation pit，but also provides valuable experiences for the reinforcement of similar foundation pit engineering.
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31

Zheng, Shan Suo, Zhi Qiang Li, Qing Lin Tao, and Pei Chao Han. "Hierarchical Genetic Algorithm for Soil-Nail Bracing." Applied Mechanics and Materials 170-173 (May 2012): 651–54. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.651.

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Hierarchical genetic algorithm (HGA) are widely used in most engineering, this paper aims to propose an optimization model of soil-nail bracing by application the hierarchical genetic algorithm. In the process of optimization, soil nailing cost is setted as the objective function and the internal overall stability of the soil nailing is setted as primary controlling factor. Finally, an example is cited to verify the optimization model. By comparison the traditional genetic algorithm with the HGA, it is concluded that HGA optimization model of soil-nail bracing gets better economic effect.
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32

Wang, Qiu, Zhi Gang Song, and Qing Xu. "Soil Nailing Optimization Design Based on Improved Response Surface." Advanced Materials Research 671-674 (March 2013): 126–32. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.126.

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Gradient algorithm is difficult to obtain explicit analytic function of the optimization model, at the same time heuristic algorithm is computationally intensive with low speed and less efficient in soil nailing optimization. To overcome these problems, a new optimization method based on improved response surface (IRS) which constructed by uniform design (UD) and non-parametric regression (NR), is proposed. The soil nailing optimization is adopted by the combination of explicit analytic model based on IRS and composing program. The optimization process is explained and a soil nailing is optimized to verify the feasibility of the proposed method. The optimum results show that the introduction of UD and NR to construct the IRS calculate fast, do not need solving the specific analytic solution and can obtain global optimal solution.
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33

Simorangkir, Melin Ester, and Andryan Suhendra. "STUDI PENGARUH KEMIRINGAN, JARAK, DAN PANJANG SOIL NAILING TERHADAP STABILITAS LERENG." JMTS: Jurnal Mitra Teknik Sipil 3, no. 3 (August 20, 2020): 722. http://dx.doi.org/10.24912/jmts.v3i3.8754.

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A landslide happened at a slope in South Sulawesi. The slope has 4 soil layers with a height of 15 m and a slope angle of 69,86°. Stability of the slope needs to be analized with a program based on limit equilibrium to know the value of its safety factor. After being analyzed, the safety factor of the slope is 0,883, which is less than 1,5. It shows that the slope need a soil reinforcement. For this analysis, soil nailing is being used to be the soil reinforcement. With using soil nailing, the stability of the slope needs to be analyzed again with a program based on limit equilibrium . In each analysis, there are some variations. The first analysis is a variety of nail inclination. The second analysis is a variety of nail spacing. The third analysis is a variety of nail length. The result of the safety factor of all analysis is more than minimal, 1,5. Pada suatu lereng di daerah Sulawesi Selatan, terjadi longsor. Lereng yang mengalami longsor tersebut memiliki 4 lapisan tanah dengan ketinggian lerengnya 15 m dan kemiringan lerengnya 69,86°. Stabilitas lereng perlu dianalisis menggunakan sebuah program berbasis metode kesetimbangan batas untuk mengetahui nilai keamanan lereng tersebut. Setelah dianalisis, diketahui nilai keamanan lereng di bawah 1,5, yaitu 0,883. Nilai keamanan lereng tersebut menunjukkan bahwa lereng tersebut membutuhkan sebuah metode perkuatan tanah. Pada analisis ini, metode perkuatan tanah yang digunakan pada lereng adalah soil nailing. Dengan menggunakan soil nailing, dilakukan analisis stabilitas lereng kembali menggunakan program berbasis metode kesetimbangan batas untuk memperoleh angka faktor keamanan lereng. Di setiap analisis menggunakan soil nailing, digunakan beberapa variasi nail. Analisis stabilitas lereng pertama menggunakan variasi kemiringan nail. Analisis stabilitas lereng kedua menggunakan variasi jarak antar nail. Analisis stabilitas lereng ketiga menggunakan variasi panjang nail. Hasil akhir faktor keamanan lereng setelah dilakukan semua analisis adalah lebih dari 1,5.
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34

Menkiti, C. O., M. Long, G. W. E. Milligan, and P. Higgins. "Soil Nailing in Dublin Boulder Clay." Geotechnical and Geological Engineering 32, no. 6 (July 28, 2013): 1427–38. http://dx.doi.org/10.1007/s10706-013-9679-6.

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35

Pedley, M. J., and R. S. Pugh. "Soil nailing in the Hastings Beds." Geological Society, London, Engineering Geology Special Publications 10, no. 1 (1995): 361–68. http://dx.doi.org/10.1144/gsl.eng.1995.010.01.32.

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36

Zhao, Yan Lin, and Wei Guang An. "Reliability-Based Stability Analysis of Foundation Pit Supported by Micro-Pile Composite Soil Nailing." Advanced Materials Research 243-249 (May 2011): 2829–33. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2829.

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Considering the co-action of micro-pile and soil nailing, the state equation of limit equilibrium and the performance function of inner global stability of foundation pit supported by the micro-pile composite soil nailing is set up with the slope limit equilibrium theory and the circular sliding slice method. The calculating model of sliding surface for inner global stability of foundation pit is established with the geometry controlling method and the optimization searching of the most dangerous sliding surface is achieved. Then with the shear strength indexes of soil as random variables, the partial derivatives of the performance function to all random variables is deduced and the reliability index of inner global stability of foundation pit supported by micro-pile composite soil nailing is calculated with the design checking point method. Finally, the effects of coefficients of variability of the random variables on reliability index are analyzed.
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37

Ding, Jiang Shu, Yao Qiang Xian, and Tian Jun Liu. "The 3-D Finite Element Numerical Analysis of Composite Soil Nailing Walls in the Foundation Pit Engineering." Applied Mechanics and Materials 90-93 (September 2011): 2358–62. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.2358.

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Combined with one foundation pit engineering in Guangzhou, the method was adopted in this paper, by which the in-situ test and finite element analysis were integrated. According to situation of study and demand of engineering, the study in composite soil nailing walls system was focused on working mechanism. The law of soil-nailing support technology for deep excavation was pointed out and summarized to provide reference to similar projects.
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38

Xu, Zhong Qing, Yong Gang Ding, Luo Yao, and Qiang Jun Li. "Application of the Soil Nailing Wall on Foundation Engineering." Advanced Materials Research 418-420 (December 2011): 739–43. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.739.

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The soil nailing wall is a kind of technology for supporting and strengthening the in-situ soil. The nails are integrated with the soil around tightly, so that they can form into a type of composite soil, relying on the frictional force of contact surface. Based on the analysis of the constructional scheme of the national stadium, the key factors for controlling the quality of the construction were found. The quality system during the project should be managed strictly. And the diameter, length and strength of the anchorage ought to be executed exactly. This scheme provided reasons for the national stadium’s soil nailing wall’s safety and quality assurance.
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39

Wu, Di, Peng Wang, and Guo Qiang Liu. "Influence of C and Φ Values on Slope Supporting by Soil Nailing Wall in Thick Miscellaneous Fill Site." Advanced Materials Research 706-708 (June 2013): 504–7. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.504.

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In recent years, soil nailing wall supporting technology is widely applied in the design of pit supporting. However, in the design of deep foundation pit supporting in miscellaneous fill site, the values of cohesion and angle of internal friction, that is c and φ, are too conservative to be chosen, so the security and economy cannot be obtained together. To study the influence of c and φ values on deep foundation pit supporting design in miscellaneous fill site, Lizheng-FSPw60 was the analysis software, and the circular sliding simple slice method was the theory. It is concluded that cohesion and internal friction angle of the soil have great influence on the stability of the soil nailing wall. Analysis and practice show that if c and φ values are reasonably chosen, the slope supported by soil nailing wall in thick miscellaneous fill site will be much safer, and the project will be less wasteful.
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40

Querelli, André, Tiago de Jesus Souza, and André Augusto Cepeda. "Soil nailing wall with vertical nails to displacement reduction: Brazilian Practice." DYNA 89, no. 223 (September 8, 2022): 61–66. http://dx.doi.org/10.15446/dyna.v89n223.97405.

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Most of the time, geotechnical engineering interventions require solutions that necessarily aim for better use of the available space. Many slope stabilization techniques were developed following that assumption, and one of the most applied procedures in Brazil is the soil nailing reinforcement. These engineering techniques are constantly improving. Consequently, a continuous study of the design and behavior of soil nails is important. The technique of vertical nails reinforcement in soil nailing is recent in the Brazilian scenario. Nowadays, some constructors started to use them near the slope face when stabilizing huge excavations. This paper aims to verify the vertical nails’ efficiency in reducing horizontal displacements. We present three numerical modeling analyses using the finite elements method (FEM). The proposed model is a soil nailing of approximately 18m high in a homogeneous subsoil in São Paulo city. Comparing situations with and without vertical nails, as if an inclined face (slope), the results showed that adding those nails could reduce horizontal displacements.
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41

Li, Lian Xiang, Ming Gong, and Ying Jie Zheng. "Monitor and Analysis of the Foundation Pit Combination Support of Jinan West Railway Station Ground." Applied Mechanics and Materials 351-352 (August 2013): 1207–16. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.1207.

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The foundation pit of Jinan West Railway Station Ground is vast in area and large in Excavating depth and closely adjacent to the high-speed railway buildings and subgrade, therefore the foundation pits deformation is strictly controlled. The foundation pit supporting design applies a comprehensive mode by combing soil nailing wall, compound soil nailing wall and bored cast-in-situ piles with anchor cables. Monitoring has been carried out on internal force of side slope and supporting structure throughout the excavation of foundation pit, so detailed monitoring data have been acquired. It has been acquired, by contrastively analyzing, that since the foundation pits displacement volume may reach about one half of the final displacement volume at the time when its excavation is completed, with a huge rate of change, supporting should be timely completed during the excavation period. Compound soil nailing wall can reduce side slopes horizontal displacement volume about 25~30% , compared with soil nailing wall, and effectively add the rigidness of side slope, however it is not very useful for settlement; We get utmost horizontal displacement volume at one third to two fifths of pile length, so it is advised to increase density and strength of anchor cables.
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42

Mohamed, Mahmoud H., Mohd Ahmed, Javed Mallick, and Pham V. Hoa. "An Experimental Study of a Nailed Soil Slope: Effects of Surcharge Loading and Nails Characteristics." Applied Sciences 11, no. 11 (May 25, 2021): 4842. http://dx.doi.org/10.3390/app11114842.

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The earth nailing system is a ground improvement technique used to stabilize earth slopes. The behavior of the earth nailing system is dependent on soil and nailing characteristics, such as the spacing between nails, the orientation, length, and method of installation of nails, soil properties, slope height and angle, and surcharge loading, among others. In the present study, a three-dimensional physical model was built to simulate a soil nailed slope with a model scale of 1:10 with various soil nail characteristics. The simulated models consist of Perspex strips as facing and steel bars as a reinforcing system to stabilize the soil slope. Sand beds in the model were formed, using a sand raining system. The performance of nailed soil slope models under three important nails characteristics, i.e., length, spacing and orientation, with varying surcharge loading were studied. It was observed that there is a reduction in the lateral movement of slope and footing settlements with an increase in length. It was found that the slope face horizontal pressure is non-linear with different nail characteristics. The increase in length and inclination of the soil nails decreased the vertical, horizontal stress and footing settlement, while the increase in spacing of the nails increased the vertical and horizontal stress behind the soil mass.
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43

Su, Li Jun, Jian Hua Yin, Shan Yong Wang, and Hong Jian Liao. "Numerical Simulation of Pressure Grouting in Soil Nail Pull-Out Tests." Key Engineering Materials 353-358 (September 2007): 1037–40. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.1037.

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Soil nailing is a widely used technique for stabilizing slopes and excavations. In all current design methods, the nail-soil interface shear strength, that is, the pull-out resistance of a soil nail is an important parameter which controls the design and safety assessment of the soil nailing system. The pressure grouting is a cost effective method for increasing the soil nail pull-out resistance and in turn improving the performance of the nailed structure. In this paper, a three dimensional (3-D) finite element (FE) model for pull-out tests is established and verified by comparing simulated results with measured data. This model is then used to simulate the effect of grouting pressure on the soil nail pull-out resistance.
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44

Zamiran, Siavash, Hadi Ghojavand, and Hamidreza Saba. "Numerical Analysis of Soil Nail Walls under Seismic Condition in 3D Form Excavations." Applied Mechanics and Materials 204-208 (October 2012): 2671–76. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.2671.

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Typically, temporary soil nailing systems are not required to provide for design level earthquake occurrences consistent with the building or structure being constructed inside the excavation. However, the seismic response of the permanent soil nail walls during the earthquakes should be evaluated. On the other hand, evaluation of 3D response of soil nailing walls have some strange manners that should be considered in the numerical analysis. In this paper, numerical simulations of soil nail walls under vibrational input have been carried out, and the results are compared with the function of soil nail walls under ordinary statistical loading. The behaviour of geometry of nails are mentioned under static and seismic analysis. After that some investigations are carried out to find respond of soil nailing walls in some 3D excavation forms. The analysis is performed with finite difference software called FLAC3D. The results are prepared as lateral displacement of the walls and normalized maximum tensile forces for nails. These results can demonstrate the behavior of external and internal resistance of soil nail walls under seismic and static analysis. The deformation of wall under the static and dynamic manner varies in a wide range. On the other hand, tensile loads that are produced in nails under the static manner are namely 50% less than the dynamic manner.
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45

Mangnejo, D. A., S. J. Oad, S. A. Kalhoro, S. Ahmed, F. H. Laghari, and Z. A. Siyal. "Numerical Analysis of Soil Slope Stabilization by Soil Nailing Technique." Engineering, Technology & Applied Science Research 9, no. 4 (August 10, 2019): 4469–73. http://dx.doi.org/10.48084/etasr.2859.

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Slope instability may be a result of change in stress conditions, rise in groundwater table and rainfall. Similarly, many slopes that have been stable for several years can abruptly fail due to changes in geometry, weak soil shear strength or as the effect of an external force. Debris flows (i.e. slope failures) take place without any warning and can have devastating results. So, it is vital to understand the slope failure mechanism and adopt safety prevention measures. Soil nailing is one of the widely used stabilization techniques for soil slopes. In this study, soil nail technique is proposed to upgrade the existing slope in clay. A parametric study was conducted to understand the effects of different nail diameter (i.e. 25mm and 40mm) and nail inclination (i.e. 200, 250, 300, 350 and 400) on slope stability. Morgenstern-Price (i.e. limit equilibrium) method was used to determine the factor of safety of the slope. It was found that the factor of safety of the existing slope improved significantly with three rows of 40mm diameter nail at an inclination of 400.
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46

Wang, Deng Qun, and Yan Peng Zhu. "Prestressed Anchor Bolt Impact on the Deformation of Composite Soil Nailing." Applied Mechanics and Materials 353-356 (August 2013): 11–15. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.11.

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Finite element software was employed to establish a model to simulate the compound soil nailing. The model simulates the process of constructing prestressed compound soil nailing. Compared the condition prestressed with no prestress, analyzed the Impact of prestress anchor on the deformation in the process of construction and the effect on axial force of soil nail. Applying prestress is able to control the horizontal displacement obviously, but has not obvious effect on vertical displacement, especially place the anchor bolt at the lower part of the slope. In the process of construction, prestress has an advance effect on the deformation of foundation pit and the axial force of soil nails near the anchor bolt.
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47

Seo, Hyung-Joon, and In-Mo Lee. "Shear Behavior between Ground and Soil-Nailing." Journal of the Korean Geotechnical Society 30, no. 3 (March 31, 2014): 5–16. http://dx.doi.org/10.7843/kgs.2014.30.3.5.

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48

Mittal, Satyendra, and A. K. Biswas. "River bank erosion control by soil nailing." Geotechnical and Geological Engineering 24, no. 6 (December 2006): 1821–33. http://dx.doi.org/10.1007/s10706-006-7127-6.

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49

Menkiti, Christopher O., and Michael Long. "Performance of soil nails in Dublin glacial till." Canadian Geotechnical Journal 45, no. 12 (December 2008): 1685–98. http://dx.doi.org/10.1139/t08-084.

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Soil nailing is being used in many projects in glacial tills in Ireland, particularly to provide temporary support to steep slopes. Little design guidance is available for such materials, and it is known that the application of design procedures developed for other material is conservative. Detailed nail instrumentation and field monitoring has been undertaken during large-scale soil nailing works for the Dublin Port Tunnel project. It was found that the short-term behaviour of nails was the reverse of that assumed in current design methods. Most of the load was induced as a results of drilling and nailing the lift immediately below the nail being monitored rather than due to excavation-induced stress relief. The highest forces were developed in the upper nails where the largest ground movements occurred. This is the reverse of most current design methods where the highest soil–nail bond is assigned to the deepest nails. It seems that the observed short-term, prefailure behaviour of nailed slopes is governed more by the deformation pattern of the slope than by large-scale development of failed wedges. Current design procedures should be reviewed. Despite this, the trial confirmed that the currently used procedures are highly conservative for Dublin glacial till.
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50

Wu, Jian Chun, and Rong Shi. "Seismic Analysis of Soil Nailed Wall Using Finite Element Method." Advanced Materials Research 535-537 (June 2012): 2027–31. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.2027.

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Using dynamic elastic-plastic finite element method, on the base of works together and interaction between loess and flexible retaining wall, 3-D nonlinear FEM (ADINA) is used to analyze and discussed the dynamic response of slope protected by soil nailing retaining wall under the EL-Centro and man-made Lanzhou accelerogram. A model that is capable of simulating the nonlinear static and dynamic elastic-plastic behavior of soil is used to model the soil, and a bilinear elastic-plastic model that has hardening behavior is used to model the soil nailing. Friction-element is employed to describe the soil-structure interaction behavior.The results show that the method is safe and credible. The results of the FEM dynamic analysis can be a useful reference for engineers of the design and construction of the soil nailed wall.
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